Perthes disease
ICD-10 M91.1 · ICD-11 FB82.1

Perthes Disease in Late Fragmentation (Stage IIb) or Reconstitution — When Valgus Osteotomy Did Not Resolve Hinge Abduction

This page addresses a specific clinical juncture in Perthes disease: a child in the late stage of fragmentation (Stage IIb) or early reconstitution who has reduced hip abduction range of motion and hinge abduction — and in whom the prior surgical line did not achieve its intended goals.

Clinical Scenario

In the late part of the fragmentation stage or early reconstitution, management aims to minimise the effects of femoral head deformation that has already occurred. At this stage, some children present with a reduced range of motion — particularly abduction — and attempted abduction results in hinging of the femoral head against the acetabular rim.

Prior Treatment and Why It Was Insufficient

A valgus femoral osteotomy was performed to overcome hinge abduction and bring a more congruent surface of the femoral head beneath the acetabulum. The goals of that procedure — hip pain relief and resolution of hinge abduction — were not fully achieved. This failure to reach the intended targets prompts escalation to the next management step.

Next-Step Approach

The subsequent intervention addresses uncovering of the femoral head that arises as a consequence of the valgus osteotomy. An acetabular-side procedure is involved; timing considerations are important, as in younger children spontaneous improvement may occur without immediate surgical intervention. The complete sequence and decision criteria are in the full structured protocol.

Clinical goal: adequate femoral head acetabular coverage on hip radiograph.

Instant Access to Structured Evidence-Based Regimens

References

  1. Treatment in the late part of the stage of fragmentation or in the early part of the stage of reconstitution attempts to minimize the effects of early deformation of the femoral head that has already occurred.
  2. At this stage, some children have a reduced range of motion (particularly abduction) and attempted abduction results in hinging.
  3. A valgus osteotomy will increase uncovering of the femoral head, and this can be addressed with a shelf procedure.
  4. However, the shelf procedure should be delayed in the younger child as the acetabular cover may improve spontaneously once the abnormal forces on the lateral rim of the acetabulum while hinging are relieved by the valgus osteotomy.

DOI: 10.4103/0019-5413.143906

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